作者
勃兰特·露西,狄龙·兰迪斯
文章摘要
本文介绍了基于声发射和声谱的准脆性复合材料的破坏过程识别。测试是在准脆性复合材料上进行的。样品由分散有聚丙烯纤维的普通混凝土制成。本文确认了基于声发射和声谱识别破坏过程的可能性,并证明了识别破坏过程的能力。有人指出,为了准确识别失效机制,有必要首先分别识别它们。三维和二维光谱用于识别破坏过程。三维频谱提供了额外的信息,可以在分析声强、振幅和频率的基础上更好地识别样品结构的变化。该论文展示了构建准脆性复合材料以限制灾难性破坏过程风险的可能性,以及在不同破坏阶段使用声发射识别这些过程的可能性。
文章关键词
声发射;声谱;准脆性水泥复合材料;销毁过程
参考文献
[1] Brandt, A.M. Fiber reinforced cement-based (FRC) composites after over 40 years of development in building and civil engineering. Compos. Struct. 2008, 86, 3–9, ISSN: 0263-8223. [2] Kucharska, L.; Brandt, A.M. Pitch-based carbon fibre reinforced cement composites. In Materials for the New Millenium, Proceedings of the Materials Engineering Conference ASCE, Washington, DC, USA, 10–14 November 1996; Chong, K.P., Ed.; American Society of
Civil Engineers: New York, NY, USA, 1996; Volume 1, pp. 1271–1280. [3] Yuyama, S.; Ohtsu, M. Acoustic Emission evaluation in concrete. In Acoustic Emission-Beyond the Millennium; Kishi, T., Ohtsu, M., Yuyama, S., Eds.; Elsevier: Amsterdam, The Netherlands; Tokyo, Japan, 2000; pp. 187–213. [4] Landis, E.; Ballion, L. Experiments to relate acoustic energy to fracture energy of concrete. J. Eng. Mech. 2002, 128, 698–702. [5] Ouyang, C.S.; Landis, E.; Shh, S.P. Damage assessment in concrete using quantitative acoustic emission. J. Eng. Mech. 1991, 117, 2681–2698. [6] Ranchowski, Z.; Józ´wiak-Niedz´wiecka, D.; Brandt, A.M.; De˛bowski, T. Application of acoustic emission method to determine
critical stress in fibre reinforced mortar beams. Arch. Acoust. 2012, 37, 261–268. [7] Kim, B.; Weiss, W.J. Using acoustic emission to quantify damage in restrained fiber-reinforced cement mortars. Cem. Concr. Res. 2003, 33, 207–214. [8] Shieldsa, Y.; Garboczib, E.; Weissc, J.; Farnam, Y. Freeze-thaw crack determination in cementitious materials using 3DX-ray computed
tomography and acoustic emission. Cem. Concr. Comp. 2018, 89, 120–129. [9] Hoła, J. Acoustic Emission investigation of failure of high-strength concrete. Arch. Acoust. 1999, 24, 233–244.
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